Determinação do estoque de carbono em Teca ( Tectona grandis L. F.) em diferentes idades
The objective of this study was to evaluate the quantity of carbon in teak ( Tectona grandis L.f.), with 0.5; 1.5; 2.5; 3.5 and 5.5 years of age, during one year. The teak evaluated belonged to the BRASTECA AGROFLORESTAL LTDA company, located in the municipality of Santo Antônio of Leverger, Mato Gr...
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Veröffentlicht in: | Ciência florestal 2012-02, Vol.20 (4) |
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Sprache: | por |
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Zusammenfassung: | The objective of this study was to evaluate the quantity of carbon in
teak ( Tectona grandis L.f.), with 0.5; 1.5; 2.5; 3.5 and 5.5 years
of age, during one year. The teak evaluated belonged to the BRASTECA
AGROFLORESTAL LTDA company, located in the municipality of Santo
Antônio of Leverger, Mato Grosso, Brazil. The carbon stock for
each age was assessed every 90 days by determining the amount of litter
dry mass, organic carbon proportion in the soil, root density in the
soil and the volume of the staff and crown in the three teak trees
randomly selected for harvest. The assessment of the plant size, as
height, diameter at chest height and crown projection, was carried out
with twenty preserved plants at each age. The dry mass of the roots was
determined from the relation between the soil volume and the density of
roots of the three plants per age, by making four perforations per
plant, with six samples for each, up to 0.90 m of depth. The carbon
proportion in the soil and in the litter was obtained by age at each
collection through laboratory analysis. The average carbon found per
hectare was 122.5 t of C at 0.5 years; 104.3 t of C at 1.5 years; 180.8
t of C at 2.5 years; 303.1 t of C at 3.5 years and 322.3 t of C at 5.5
years, considering the numbers of plants per hectare at the different
ages. Afterward, the average distribution of carbon per system
component was found to be 90.8% in the soil, 5.04% to the aerial part,
3.04% in the roots and 1.21% in the litter.
O objetivo deste trabalho foi avaliar a quantidade de carbono em
cultivo de Teca ( Tectona grandis L.f.), com 0,5; 1,5; 2,5; 3,5 e 5,5
anos de idade ao longo de um ano pertencentes à empresa BrasTeca
Agroflorestal Ltda, localizada no município de Santo Antônio
do Leverger, MT. O estoque de carbono em cada idade foi obtido a cada
90 dias, por meio da determinação da quantidade de massa seca
da serapilheira acumulada, do teor de carbono orgânico no perfil
do solo, da densidade de raízes no solo e da mensuração
do volume do fuste e da copa em três plantas escolhidas ao acaso.
A avaliação do tamanho das plantas, em altura total,
diâmetro à altura do peito e projeção da copa, foi
realizada em vinte plantas preservadas em cada idade. A
quantificação do carbono da parte aérea foi realizada
por meio do corte de três plantas em cada idade, obtendo a massa
fresca total por componente. Para determinar a massa seca de
raízes, utilizou-se a relação entre volume de solo e
densidade de raiz de três plantas por |
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ISSN: | 0103-9954 |